Răspuns:
a = 3
b = 6
Rezolvare:
f : R → R, f(x) = ax + b
A(-1; 3) ∈ Gf ⇔ f(-1) = 3
-a + b = 3
B(-2; 0) ∈ Gf ⇔ f(-2) = 0
-2a + b = 0
[tex]\left \{ {{-a+b=3} \atop {-2a+b=0}} \right. \iff\left \{ {{b=3+a} \atop {-2a+b=0}} \right. \\[/tex]
-2a + 3 + a = 0
-a + 3 = 0
-a = -3
⇒ a = 3
b = 3 + a = 3 + 3
⇒ b = 6
Succes! ❀
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